MAN page from Mandrake Other perl-graph-modules-1.001-1.i386.rpm

Graph::Edge

Section: User Contributed Perl Documentation (3)
Updated: perl 5.004, patch 04
Index

NAME

Graph::Edge - object class for an edge in a directed graph

SYNOPSIS

   use Graph::Node;   use Graph::Edge;      $parent = new Graph::Node('LABEL' => 'Parent Node');   $child  = new Graph::Node('LABEL' => 'Child Node');   $edge   = new Graph::Edge('FROM' => $parent,                             'TO'   => $child);      $parent->save('simple.daVinci', 'daVinci');

DESCRIPTION

The Graph::Edge is a class implementing an edge, or arc,in a directed graph.A graph is constructed using Node and Edge objects, with nodes beingdefined with the Graph::Node class.

An Edge takes four standard attributes: ID, LABEL, FROM,and TO. In addition, you may also define any number of customattributes.Attributes are manipulated using the setAttribute,getAttribute methods, which are defined in the base class, Graph::Element.

CONSTRUCTOR

    $edge = new Graph::Edge( . . . );

This creates a new instance of the Graph::Edge object class,used in conjunction with the Graph::Node class to constructdirected graphs.

You must specify the FROM and TO attributes of an edgewhen creating it:

   $edge = new Graph::Edge('FROM'  => $parent,                           'TO'    => $child,                           'ID'    => 'identifier'                          );

where the $parent and $child are Graph::Node objects.The ID attribute is optional, and must be a unique stringidentifying the edge.If you do not specify the ID attribute, the edge will be assigneda unique identifier automatically.

AUTHOR

Neil Bowers <neilbAATTcre.canon.co.uk>

COPYRIGHT

This document was created byman2html,using the manual pages.